The purpose of this study is to examine and relate physiological, behavioral, and self-perceived changes after a period of hearing aid use and as a function of auditory training. The project will focus on the following questions: 1)Is experience-related behavioral change in hearing aid performance reflected as a neurophysiologic change? 2)Does a neurophysiologic change occur prior to or in conjunction with an experience-related behavioral change? 3) Does behavioral training modify the neurophysiologic representation of speech following the provision of hearing aids? 4)What is the relationship between physiologic, behavioral,and self-perceived change impacted by behavioral training? 5)Are neurophysiologic changes limited to trained stimuli or does auditory training alter neurophysiological responses?